uivewcontroller

问题 I am having a weird crash when using UISearchBar. I have a view controller on a storyboard and everything works fine but as soon as a drag a UISearchBar in the view controller and then run the app, I get the following crash: * thread #1: tid = 0x6d83b, 0x0462169e libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread', stop reason = signal SIGABRT frame #0: 0x0462169e libsystem_kernel.dylib`__pthread_kill + 10 frame #1: 0x045ef2c5 libsystem_pthread.dylib`pthread_kill + 101

问题 Im trying to draw/place a view (which contains a picker view and a toolbar offscreen). On launch the View is still on the screen despite changing its coordinates in viewDidLoad. self.pickerViewContainer.frame = CGRectMake(0, 722, 320, 207); Im using the storyboard. I have created the view in the storyboard, visible in the view controller. I thought i could redraw it off screen as per coordinates above. 回答1: When you use Auto layout write your view's frame related code in viewDidLayoutSubviews

问题 I have a UIViewController called 'detailViewController'. This view controller is accessed through multiple different segues using the push segue. The problem I am facing is that the back button on the detailViewController takes the user back to the previous view controller (as it should), however I would like the back button to take the user to the masterViewController (the default UIViewController in the app). How do I do this? I have tried changing the segue types however that didn't really

问题 I want to show a logo UIView always on top when the app running, I know there is a way to do that,add same UIView to every UIViewController , but I think this is not the best way to do that. when i have lot of pages,and modify the logo UIView ,must modify it every page. Did someone have better way to do this? thanks. look like this: 回答1: Since you only every have one window per app, and view's don't have levels, you have to make sure that view stays on top of the hierarchy, no matter what.